WhatsApp’s Sim card WhatSim could soon be a reality

WhatApp is by far the largest messaging platform in the world with more than million active users every month. The company has recently added VOIP calling features to the app, a move which is likely to get them on the wrong side of carriers, who have long taken special exception to this, particularly due to this cutting them out of valuable long distance and overseas phone call revenue.

It appears WhatsApp may be preparing for carriers to block this functionality, as recent translation strings for their Windows Phone app suggests they are planning to detect this and warn users if this occurs.

Your Wi-Fi network doesn’t support WhatsApp calls. Try switching to another Wi-Fi network or turn off Wi-Fi and use your mobile data connection.

{0}’s mobile carrier or Wi-Fi network doesn’t support WhatsApp calls.

Microsoft’s Skype, which is the most used long distance calling service in the world, has of course long struggled with this opposition, sometimes resulting in the service partnering with carriers for special VOIP Skype plans.